//objectDemo.Java
class objectUse{
  int x,y;
  private double a,b;
  objectUse()
  {
    x=10;
    y=20;
    a=15.0;
    b=22.0;
  }
  void setXY(int i,int j){
    x=i;
    y=j;
  }
  void setAB(double r, double s){
    a=r;
    b=s;
  }
  int getX(){
    return x;
  }
  int getY(){
    return y;
  }
  double getA(){
    return a;
  }
  double getB(){
    return b;
  }
}
public class objectDemo{
  public static void main(String args[]){
    objectUse one=new objectUse();
    System.out.println("通過訪問對象成員變量獲得類中非私有成員變量的值：");
    System.out.println("x="+one.x+"y="+one.y);
    one.setXY(20,50);
    System.out.println("通過調用對象成員方法獲得類中非私有成員變量的值：");
    System.out.println("x="+one.getX()+"y="+one.getY());
    //System.out.println(“通過訪問對象成員變量獲得類中私有成員變量的值：”);
    //System.out.println(“a=”+one.a+”b=”+one.b);
    one.setAB(5.4,12.4);
    System.out.println("通過調用對象成員方法獲得類中私有成員變量的值：");
    System.out.println("a="+one.getA()+"b="+one.getB());
  }
}